| Abstract Detail
Plant-Pest Interactions Rohwer, Charles [1], Erwin, John [2]. Preference and performance of Tetranychus urticae on horticultural species treated with methyl jasmonate. Methyl jasmonate (MeJA) is a plant hormone involved in stress and defense responses. We studied the ability of exogenous MeJA to affect performance of twospotted spider mite (Tetranychus urticae Koch) on impatiens (Impatiens walleriana Hook f.) and pansy (Viola × wittrockiana Gams.), and mite preference on impatiens, pansy, geranium (Pelargonium × hortorum L.H. Bailey), and tomato (Solanum lycopersicum L.). We discovered that a spray containing 1×10-4 M MeJA, but not 5×10-6 M, reduced the proliferation of mites on impatiens and pansy compared to controls when applied one day before mite introduction. In a novel whole-plant assay, we also found that mites preferred to vacate plants previously treated with 1×10-4 M MeJA compared to plants treated with a control solution. We believe MeJA or similar elicitors of plant defense have promise in the future of integrated pest management in production of greenhouse-grown food or ornamental plants.
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1 - University of Minnesota, Department of Horticultural Science, 305 Alderman Hall, 1970 Folwell Ave., St. Paul, MN, 55108, USA
2 - University of Minnesota, Department of Horticultural Science
Keywords:
twospotted spider mite
Tetranychus urticae
methyl jasmonate
bedding plants.
Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P14008
Abstract ID:368 |
